Final answer:
Cassius uses a metaphor in the bolded lines from Shakespeare's 'Julius Caesar,' implying that Caesar is like a predator to the Roman people, who are depicted as weak prey.
Step-by-step explanation:
The figurative language in the bolded lines uses a metaphor to compare Caesar to a predatory animal and the Romans to prey, suggesting that Caesar only assumes the role of a tyrant because the Romans are passive and easily dominated. Cassius is presenting the idea that Caesar's rise to power is facilitated by the weakness of the Roman people (referred to as 'sheep'). Therefore, the statement that best explains the figurative language is: Cassius uses a metaphor to convince Casca that Caesar is preying on the weak, vulnerable people of Rome.